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Glazing merely suggests the windows in your home, consisting of both openable and set windows, along with doors with glass and skylights. Glazing actually simply indicates the glass part, but it is generally used to refer to all aspects of an assembly including glass, films, frames and home furnishings. Taking note of all of these elements will help you to achieve efficient passive design.

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Energy-efficient glazing makes your house more comfortable and dramatically lowers your energy expenses. Nevertheless, unsuitable or badly created glazing can be a major source of unwanted heat gain in summertime and substantial heat loss and condensation in winter. Up to 87% of a home's heating energy can be acquired and approximately 40% lost through windows.

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Glazing is a significant investment in the quality of your home. A preliminary financial investment in energy-efficient windows, skylights and doors can considerably reduce your yearly heating and cooling bill.

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This tool compares window selections to a base level aluminium window with 3mm clear glass. Understanding a few of the essential properties of glass will assist you to select the very best glazing for your house. Key properties of glass Source: Adapted from the Australian Window Association The quantity of light that travels through the glazing is referred to as visible light transmittance (VLT) or noticeable transmittance (VT).

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This might lead you to turn on lights, which will result in higher energy expenses. Conduction is how easily a product conducts heat. This is called the U value. The U value for windows (expressed as Uw), describes the conduction of the whole window (glass and frame together). The lower the U worth, the higher a window's resistance to heat circulation and the much better its insulating worth.

If your house has 70m2 of glazing with aluminium frames and clear glass with a U worth of 6. 2W/m2 C, on a winter season's night when it is 15C chillier outside compared to inside your home, the heat loss through the windows would be: 6. 2 15 70 = 6510W That is comparable to the overall heat output of a large space gas heating system or a 6.

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If you select a window with half the U value (3. 1W/m2 C) (for example, double glazing with an argon-filled gap and less-conductive frames), you can cut in half the heat loss: 3. 1 15 70 = 3255W The solar heat gain coefficient (SHGC) for windows (revealed as SHGCw) measures how readily heat from direct sunlight streams through a whole window (glass and frame together).

The lower a window's SHGC, the less solar heat it sends to your house interior. Glazing makers declare an SHGC for each window type and style. The real SHGC for windows is affected by the angle that solar radiation strikes the glass. This is understood as the angle of incidence.

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When the sun is perpendicular (at 90) to the glass, it has an angle of incidence of 0 and the window will experience the maximum possible solar heat gain. The SHGC stated by glazing makers is always determined as having a 0 angle of incidence. As the angle increases, more solar radiation is shown, and less is sent.